US6246021B1 - Switching device - Google Patents

Switching device Download PDF

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Publication number
US6246021B1
US6246021B1 US09/381,875 US38187599A US6246021B1 US 6246021 B1 US6246021 B1 US 6246021B1 US 38187599 A US38187599 A US 38187599A US 6246021 B1 US6246021 B1 US 6246021B1
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US
United States
Prior art keywords
contact arm
braking body
contact
braking
switching device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/381,875
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English (en)
Inventor
Lutz Thilker
Albert Zacharias
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eaton Industries GmbH
Original Assignee
Moeller GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Moeller GmbH filed Critical Moeller GmbH
Assigned to KLOECKNER-MOELLER-GMBH reassignment KLOECKNER-MOELLER-GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: THILKER, LUTZ, ZACHARIAS, ALBERT
Assigned to MOELLER GMBH reassignment MOELLER GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KLOCKNER-MOELLER GMBH
Application granted granted Critical
Publication of US6246021B1 publication Critical patent/US6246021B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock

Definitions

  • the present invention relate to a switching device having a contact arrangement having at least one movable contact member arranged on a rotatable or displaceable contact arm and at least one stationary contact member.
  • German Patent No. 37 25 860 A1 describes a power circuit-breaker having a contact arrangement including a movable contact member arranged on a rotatable contact arm and a stationary contact member, with a stop being provided to limit the movement of the contact arm in opening the movable contact member.
  • a suitable mechanical gripping device One disadvantage of such a switching device is that there is the risk when opening the contact arrangement that the contact arm might be thrown back by the stop, especially at high switching capacities, before the mechanical gripping device is operative, so the contact arrangement is unintentionally closed again.
  • French Patent No. 1,048,980 A describes a switching device according to the definition of the species having a contact arrangement having a movable contact member arranged on a contact arm and a stationary contact member, where the switching device includes a stop in the form of a movably arranged braking body that limits the movement of the contact arm in opening the contact arrangement. After impact, the contact arm moves together with the damping buffer belonging to the braking body until it is braked. There is still the risk here that a contact arm striking with a high energy might be thrown back due to the elasticity of the damping buffer made of cured rubber or an equivalent material.
  • an object of the present invention is to provide a switching device where the contact arm is braked on reaching its defined end position even in the case of high switching capacities, without then being thrown back by the stop.
  • the present invention includes a first stop in the form of movably arranged braking body.
  • the first stop is movable as a whole, and the inertias of a contact arm including a movable contact member the braking body that are relevant for impact are approximately equal so that an impact is executed when the contact arm strikes the braking body, so that the contact arm is braked and the braking body is moved.
  • the present invention employs a concept of using a movable braking body as a stop whose material and inertia (i.e., inert mass or moment of inertia) are matched to the contact arm so that when the contact arm strikes the braking body, there is an impact such that the contact arm is strongly braked and the braking body is displaced in a defined direction at a corresponding speed.
  • inertia i.e., inert mass or moment of inertia
  • the braking body may optionally then be braked by suitable additional means, e.g., a second stop or a spring, after reaching a defined distance.
  • suitable additional means e.g., a second stop or a spring
  • a damping body is provided between the braking body and the second stop, braking the movement of the switch arm after it collides with the braking body, if the braking body is in turn moved back into its starting position.
  • This damping body can preferably be used at the same time as a holding element for the braking body. In order for the contact arm not to be struck again by the braking body moving backwards and thus be swung back, it has proven advantageous for the braking body to have a return stop.
  • an elastically or plastically deformable material such as lead is used for the braking body.
  • a large portion of the energy of motion of the contact arm can thus be absorbed permanently as soon as the contact member strikes the braking body.
  • the permanent deformation of the braking body can also easily be utilized (e.g., by using an inspection window or a pressure sensor, etc.) to display the lifetime of the switching device.
  • the braking body prefferably be supported by a guide so that it moves in the direction of impact after impact with the contact arm.
  • the switching device is one pole of a power circuit-breaker having two stationary contact members and two movable contact members per pole to be switched, with the movable contact members being attached to the two opposite ends of the contact arm and one braking body being provided for each end of the contact arm.
  • the contact arm can be pivoted about a centrally positioned axis or if the contact arm is linearly movable.
  • FIG. 1 shows a side view of the contact arrangement of a switching device according to the present invention having two rotatable contact members arranged on one contact arm and two braking bodies opposite the ends of the contact arm, with the contact arrangement being in its closed position;
  • FIG. 2 shows the detail labeled as II in FIG. 1, with the braking body being mounted in a damping body;
  • FIG. 3 shows a switching device according to the present invention having a return stop to limit the rebound movement of the braking body
  • FIG. 4 shows a side view of another embodiment of the present invention, with the braking body being arranged displaceably at an angle of about 45° to the movement of the contact arm and;
  • FIG. 5 shows a section through one embodiment of the present invention, where the braking body is made of a plastically deformable material.
  • FIG. 1 shows a power circuit-breaker 1 including an interrupter chamber casing having a casing wall 2 , which is indicated only schematically, and a contact arrangement 3 arranged in the casing.
  • Two terminals 4 , 5 are provided for connecting power circuit-breaker 1 to a suitable electric circuit and are connected by rail conductors 6 , 7 in the form of a loop to two stationary contact members 8 , 9 .
  • Stationary contact members 8 , 9 are bridged by a contact arm 11 rotatable about an axis 10 . Both arm halves 12 , 13 of rotatable contact arm 11 press against stationary contact members 8 , 9 by way of movable contact members 14 , 15 .
  • a braking body (first stop) 16 , 17 is arranged between casing wall 2 and the two sides of contact arm 11 opposite movable contact members 14 , 15 .
  • the braking bodies are made, for example, of the same material (e.g., copper) as the contact arm.
  • the masses of both braking bodies 16 , 17 are matched to the mass of contact arm 11 including movable contact members 14 , 15 so that an elastic impact is executed with an opening movement in the direction indicated by arrows 100 when contact arm 11 strikes respective braking body 16 , 17 , so that contact arm 11 is strongly braked (ideally braked completely) and respective braking body 16 , 17 is displaced toward casing wall 2 at a corresponding rate.
  • Casing wall 2 is designed as a second stop 18 , 19 for braking the braking body in the impact area of respective braking body 16 , 17 .
  • respective braking body 16 , 17 is preferably mounted in a damping body 20 made of a flexible material (preferably rubber) whose movement is partially braked after impact of contact arm 11 against braking body 16 , 17 .
  • a damping body 20 made of a flexible material (preferably rubber) whose movement is partially braked after impact of contact arm 11 against braking body 16 , 17 .
  • FIG. 3 shows a corresponding embodiment of a return stop 21 , where the return stop is formed by the inside step of a step recess of a corresponding carrier part 22 .
  • the contact arm can be braked by a movable braking body not only when using rotatable contact arms but also when using displaceable contact arms.
  • a spring having a corresponding characteristic may also be used as the damping body.
  • the respective braking body need not be arranged in the area of the ends of the contact arm, as shown in the figures, but in particular with regard to implementation of a straight central impact of the impacting body with the impacted body, it may be arranged so that the direction of impact coincides with the line connecting the mid points of the contact arm (or contact arm half) and the braking body.
  • FIG. 4 illustrates such an embodiment, showing a contact arm 11 ′ which can pivot about an axis 10 ′; in its opening movement, it strikes against a braking body 16 ′ supported by a guide 23 in such a way that it is displaced obliquely outward along guide 23 .
  • the material of the braking body need not necessarily be only an elastically deformable material. Instead, the braking body may also be at least partially plastically deformable. Lead, for example, may be used as the material in this case. Therefore, a large portion of the energy of motion of the contact arm is absorbed permanently as soon as the contact member strikes the braking body. In such an embodiment, the permanent deformation of the braking body can also easily be utilized to display the lifetime of the switching device.
  • FIG. 5 shows a corresponding embodiment of an arrangement having a braking body made of a plastically deformable material. Contact arm 24 is indicated only schematically, and plastically deformable braking body 25 is also shown. A deformation space 26 into which the braking body can yield (dotted line) when the contact arm strikes is provided on the side facing away from contact arm 24 .

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Push-Button Switches (AREA)
  • Massaging Devices (AREA)
  • Valve Device For Special Equipments (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Eye Examination Apparatus (AREA)
  • Seal Device For Vehicle (AREA)
  • Vehicle Body Suspensions (AREA)
US09/381,875 1997-03-27 1998-03-11 Switching device Expired - Fee Related US6246021B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19712958A DE19712958C1 (de) 1997-03-27 1997-03-27 Schaltvorrichtung
DE19712958 1997-03-27
PCT/EP1998/001386 WO1998044524A1 (de) 1997-03-27 1998-03-11 Schaltvorrichtung

Publications (1)

Publication Number Publication Date
US6246021B1 true US6246021B1 (en) 2001-06-12

Family

ID=7824836

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/381,875 Expired - Fee Related US6246021B1 (en) 1997-03-27 1998-03-11 Switching device

Country Status (6)

Country Link
US (1) US6246021B1 (de)
EP (1) EP0970497B1 (de)
AT (1) ATE230155T1 (de)
AU (1) AU7033498A (de)
DE (2) DE19712958C1 (de)
WO (1) WO1998044524A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6489869B2 (en) * 2000-03-08 2002-12-03 Juergen Breitlow-Hertzfeldt Electrical component and process for the manufacture thereof
US6590172B1 (en) * 2002-03-29 2003-07-08 General Electric Company Circuit breaker mechanism for a rotary contact system
US7064284B1 (en) * 2005-01-13 2006-06-20 Eaton Corporation Circuit breaker with bumper
CN102237227A (zh) * 2010-04-21 2011-11-09 Abb股份公司 具有双断路的配电设备
CN102856086A (zh) * 2011-06-29 2013-01-02 西门子公司 切换装置
CN109411247A (zh) * 2017-08-18 2019-03-01 日立电梯（中国）有限公司 一种开关防回弹装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1132935B1 (de) * 2000-03-08 2006-08-23 Tyco Electronics AMP GmbH Elektrisches Bauelement und Verfahren zu seiner Herstellung
DE102005014006B4 (de) * 2005-03-26 2013-09-19 Abb Ag Elektrisches Schaltgerät
DE102008024387A1 (de) * 2008-05-15 2009-11-19 Siemens Aktiengesellschaft Schaltgerät

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1048980A (fr) 1950-12-08 1953-12-28 Westinghouse Electric Corp Amortisseur pour disjoncteur
DE1025041B (de) 1954-09-03 1958-02-27 Siemens Ag Elektrischer Kippschalter
US3443253A (en) * 1966-12-05 1969-05-06 Babcock Electronics Corp Armature damping structure
DE2037552A1 (de) 1970-07-29 1972-02-03 Siemens Ag Selbstschalter, insbesondere Fehler stromschutzschalter
US4563557A (en) * 1984-09-28 1986-01-07 Westinghouse Electric Corp. Molded case circuit breaker with a movable contact arm shock absorbing member
US4650946A (en) * 1985-11-27 1987-03-17 Westinghouse Electric Corp. Circuit breaker with stop plate for contact arm
DE3725860A1 (de) 1986-08-04 1988-02-18 Mitsubishi Electric Corp Mehrpoliger schaltungsunterbrecher
US4891617A (en) * 1988-08-01 1990-01-02 Westinghouse Electric Corp. Rubber stops in outside poles
US5023583A (en) * 1988-10-21 1991-06-11 Westinghouse Electric Corp. Circuit breaker contact operating structure
US5089795A (en) * 1990-06-29 1992-02-18 General Electric Company Compact molded case circuit breaker with movable contact arm rebound cushion
US5192841A (en) * 1991-11-06 1993-03-09 Westinghouse Electric Corp. Circuit breaker with shock absorbing mechanism
DE4201956A1 (de) 1992-01-24 1993-07-29 Siemens Ag Kontaktanordnung fuer vakuumschalter
DE29510909U1 (de) 1995-07-06 1995-09-14 Klöckner-Moeller GmbH, 53115 Bonn Strombegrenzendes Kontaktsystem mit Rückfallverzögerung des elektrodynamisch betätigten beweglichen Kontaktes

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1048980A (fr) 1950-12-08 1953-12-28 Westinghouse Electric Corp Amortisseur pour disjoncteur
DE1025041B (de) 1954-09-03 1958-02-27 Siemens Ag Elektrischer Kippschalter
US3443253A (en) * 1966-12-05 1969-05-06 Babcock Electronics Corp Armature damping structure
DE2037552A1 (de) 1970-07-29 1972-02-03 Siemens Ag Selbstschalter, insbesondere Fehler stromschutzschalter
US4563557A (en) * 1984-09-28 1986-01-07 Westinghouse Electric Corp. Molded case circuit breaker with a movable contact arm shock absorbing member
US4650946A (en) * 1985-11-27 1987-03-17 Westinghouse Electric Corp. Circuit breaker with stop plate for contact arm
DE3725860A1 (de) 1986-08-04 1988-02-18 Mitsubishi Electric Corp Mehrpoliger schaltungsunterbrecher
US4891617A (en) * 1988-08-01 1990-01-02 Westinghouse Electric Corp. Rubber stops in outside poles
EP0353950A2 (de) 1988-08-01 1990-02-07 Eaton Corporation Gummianschläge in Aussenpolen
US5023583A (en) * 1988-10-21 1991-06-11 Westinghouse Electric Corp. Circuit breaker contact operating structure
US5089795A (en) * 1990-06-29 1992-02-18 General Electric Company Compact molded case circuit breaker with movable contact arm rebound cushion
US5192841A (en) * 1991-11-06 1993-03-09 Westinghouse Electric Corp. Circuit breaker with shock absorbing mechanism
DE4201956A1 (de) 1992-01-24 1993-07-29 Siemens Ag Kontaktanordnung fuer vakuumschalter
DE29510909U1 (de) 1995-07-06 1995-09-14 Klöckner-Moeller GmbH, 53115 Bonn Strombegrenzendes Kontaktsystem mit Rückfallverzögerung des elektrodynamisch betätigten beweglichen Kontaktes

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6489869B2 (en) * 2000-03-08 2002-12-03 Juergen Breitlow-Hertzfeldt Electrical component and process for the manufacture thereof
US6590172B1 (en) * 2002-03-29 2003-07-08 General Electric Company Circuit breaker mechanism for a rotary contact system
US7064284B1 (en) * 2005-01-13 2006-06-20 Eaton Corporation Circuit breaker with bumper
US20060151307A1 (en) * 2005-01-13 2006-07-13 Eaton Corporation Circuit breaker with bumper
CN102237227A (zh) * 2010-04-21 2011-11-09 Abb股份公司 具有双断路的配电设备
CN102856086A (zh) * 2011-06-29 2013-01-02 西门子公司 切换装置
CN102856086B (zh) * 2011-06-29 2015-04-29 西门子公司 切换装置
CN109411247A (zh) * 2017-08-18 2019-03-01 日立电梯（中国）有限公司 一种开关防回弹装置

Also Published As

Publication number Publication date
EP0970497A1 (de) 2000-01-12
DE19712958C1 (de) 1998-05-07
DE59806727D1 (de) 2003-01-30
WO1998044524A1 (de) 1998-10-08
EP0970497B1 (de) 2002-12-18
AU7033498A (en) 1998-10-22
ATE230155T1 (de) 2003-01-15

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AS Assignment

Owner name: KLOECKNER-MOELLER-GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:THILKER, LUTZ;ZACHARIAS, ALBERT;REEL/FRAME:010361/0312

Effective date: 19990913

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Owner name: MOELLER GMBH, GERMANY

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Effective date: 20130612